Rumer Willis and some female pals grabbed lunch at Joan's on Third yesterday, and we couldn't help but notice that Bruce and Demi's eldest daughter forgot one very important clothing item - her bra!

She might not have been sporting undergarments, but she still looked adorbs in a striped mini-skirt, cardigan, and motorcycle boots.

We wonder what Miss Willis and her sisters think of their ex-stepdad Ashton Kutcher reportedly house hunting in Chicago with new love Mila Kunis? Since they are rumored to be at odds with their mom, we bet they are supportive of the Two and a Half Men actor finding happiness and settling down.